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Merge pull request #196 from totherme/hide_internals
Hide test framework internals
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package internal | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
| ) | ||
|
|
||
| // AddressManager allocates a new address (interface & port) a process | ||
| // can bind and keeps track of that. | ||
| type AddressManager struct { | ||
| port int | ||
| host string | ||
| } | ||
|
|
||
| // Initialize returns a address a process can listen on. It returns | ||
| // a tuple consisting of a free port and the hostname resolved to its IP. | ||
| func (d *AddressManager) Initialize() (port int, resolvedHost string, err error) { | ||
| if d.port != 0 { | ||
| return 0, "", fmt.Errorf("this AddressManager is already initialized") | ||
| } | ||
| addr, err := net.ResolveTCPAddr("tcp", "localhost:0") | ||
| if err != nil { | ||
| return | ||
| } | ||
| l, err := net.ListenTCP("tcp", addr) | ||
| if err != nil { | ||
| return | ||
| } | ||
| d.port = l.Addr().(*net.TCPAddr).Port | ||
| defer func() { | ||
| err = l.Close() | ||
| }() | ||
| d.host = addr.IP.String() | ||
| return d.port, d.host, nil | ||
| } | ||
|
|
||
| // Port returns the port that this AddressManager is managing. Port returns an | ||
| // error if this AddressManager has not yet been initialized. | ||
| func (d *AddressManager) Port() (int, error) { | ||
| if d.port == 0 { | ||
| return 0, fmt.Errorf("this AdressManager is not initialized yet") | ||
| } | ||
| return d.port, nil | ||
| } | ||
|
|
||
| // Host returns the host that this AddressManager is managing. Host returns an | ||
| // error if this AddressManager has not yet been initialized. | ||
| func (d *AddressManager) Host() (string, error) { | ||
| if d.host == "" { | ||
| return "", fmt.Errorf("this AdressManager is not initialized yet") | ||
| } | ||
| return d.host, nil | ||
| } |
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